Mimick the launcher start intent for the app when starting it

The Android launcher uses the following settings to start apps:
- MAIN action
- LAUNCHER category
- FLAG_ACTIVITY_NEW_TASK
- FLAG_ACTIVITY_RESET_TASK_IF_NEEDED
Without those settings there were discrepancies between Selendroid and
Android when trying to bring the app back to foreground: it would not
bring back the existing Activity stack but create new activities